Deathless
Amata Sutta  (SN 47:41)

At Savatthi. “Monks, remain with your minds well-established in the four establishings of mindfulness. Don’t let the deathless be lost for you.

“In which four? There is the case where a monk remains focused on the body in & of itself—ardent, alert, & mindful—subduing greed & distress with reference to the world. He remains focused on feelings… mind… mental qualities in & of themselves—ardent, alert, & mindful—subduing greed & distress with reference to the world.

“Monks, remain with your minds well-established in these four establishings of mindfulness. Don’t let the deathless be lost for you.”